/*
 * Copyright 2004 original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jbfilter.jsp.converters;
@SuppressWarnings("rawtypes")
public class EnumConverter extends AbstractConverter<Enum> {

	private Class<Enum> enumClass;
	@SuppressWarnings("unchecked")
	public EnumConverter(String classForName) throws ClassNotFoundException {
		enumClass = (Class<Enum>)Class.forName(classForName);
		if (!enumClass.isEnum()) {
			// ATTENTION : the meassage is tested in EnumConverterTest
			throw new IllegalArgumentException(String.format("'%s' is not an enum.", classForName));
		}
	}
	@SuppressWarnings("unchecked")
	@Override
	protected Enum fromStringAbstractConverter(String s) {
		return Enum.valueOf(enumClass, s);
	}
	@Override
	protected String toStringAbstractConverter(Enum t) {
		return t.name();
	}
	@Override
	public Class<Enum> getRegisteredClass() {
		throw new UnsupportedOperationException("Stateful object : cannot be reused.");
	}
}
